[Ken Olson]

On 7/15/2015 5:24 PM, Volker Borchert wrote:
In the replacement steering knuckle for an IHC 453 there are two
threaded holes whose thread I can't make out: inner diameter about
10.25 mm and a pitch of 13 TPI [1].

WTF is this? It's obviously neither M12(x1,75) nor UNC1/2x13...
Is there an UNC15/32x13? Or even a cross-over 12mmx13TPI?

Any hints appreciated [2].

Volker

[1] I screwed in a 11mm square wood rod to get that accurately.
[2] Yes, I'll contact the vendor. But, I prefer not to appear totally
ignorant on the phone ;-)


Proprietary thread size?

[Lloyd E. Sponenburgh[_3_]]

Ken Olson fired this volley in news:mo745i$5t3$1
@dont-email.me:


Proprietary thread size?


nah... just a less-common size. I found it, when I actually looked:

http://www.mutualscrew.com/product/m...h-speed-steel-
85428.cfm

[Volker Borchert]

Lloyd E. Sponenburgh wrote:

nah... just a less-common size. I found it, when I actually looked:

http://www.mutualscrew.com/product/m...teel-85428.cfm

Good link, thank you - but wrong size - my wooden rod and
thread gauge say definitely that it is not "x2" but 13 TPI.

--

"I'm a doctor, not a mechanic." Dr Leonard McCoy
"I'm a mechanic, not a doctor." Volker Borchert

[Lloyd E. Sponenburgh[_3_]]

(Volker Borchert) fired this volley in
:

Good link, thank you - but wrong size - my wooden rod and
thread gauge say definitely that it is not "x2" but 13 TPI.

How LONG is this wooden 'master' (and your thread gauge) that you can
measure 2-or-so% diff in a piece of indented wood?

I'll bet it's 2mm pitch, given it's the right i.d. for a 12mm screw.

I've seen some oddballs here and there... when in doubt, make it on the
lathe, and have it heat-treated. Or, as was suggested, order one from a
vendor specializing in that machine. Thankfully, the steering wheel on
my Deutz is frozen on forever. If it ever needs replacement, I'll have
to WELD another on! G

LLoyd

[Volker Borchert]

Lloyd E. Sponenburgh wrote:
(Volker Borchert) fired this volley in
:

Good link, thank you - but wrong size - my wooden rod and
thread gauge say definitely that it is not "x2" but 13 TPI.

How LONG is this wooden 'master' (and your thread gauge) that you can
measure 2-or-so% diff in a piece of indented wood?

Don't have it at hand, but about nine turns. 13tpi is 1.954mm;
8 x 0,046mm is 0,37mm, a difference big enough to see.

I've seen some oddballs here and there... when in doubt, make it on the
lathe, and have it heat-treated.

That's Plan B. Except that I'll have to have it made, I don't have
access to a lathe, and if I had, I couldn't use it properly.

Or, as was suggested, order one from a
vendor specializing in that machine.

When talking to the vendor, I want to know what I'm talking about.

V.B.

--

"I'm a doctor, not a mechanic." Dr Leonard McCoy
"I'm a mechanic, not a doctor." Volker Borchert